The proposed 740ft skyscraper by Blackfriars Bridge has been praised by CABE as a "bold addition to London's skyline", but Westminster City Council is preparing to object to the scheme.
CABE expressed concern about the £500 million building's configuration of family housing, and suggested that there are "weaknesses in the streets and spaces in and around the development", such as the large overhang proposed at the junction of Stamford Street and Blackfriars Road.
CABE's verdict comes after reports that Westminster City Council will formally object to Beetham's planning application, citing its intrusion into the view of Horse Guards Parade from St James's Park.
Westminster's director of planning and city development, Gordon Chard, said in a letter to the Mayor of London, Ken Livingstone: "Proposals for large-scale development on the South Bank, for example, east of the former County Hall, and south of Waterloo station, could be very damaging." Chard was writing in response to the Mayor's new planning guidance on sight lines.